LINbus physical-layer interface for 12V automotive body electronics
The MCP2021-330E/SN is a half-duplex LINbus transceiver in an 8-SOIC package, designed to handle the 6V to 18V supply rail typical of automotive body-control modules — door locks, window lifts, seat adjusters, and lighting nodes that share a single-wire LIN bus. With a single driver/receiver pair (1/1) and a 175 mV receiver hysteresis, it rejects noise on the bus line without needing external filtering for most in-cabin harness runs. The -40°C to 125°C operating range covers the under-hood and cabin temperature extremes, so it fits both engine-bay and interior LIN clusters.
Supply voltage and receiver margin
The 6V to 18V supply range means the transceiver stays alive through a cold-crank dip to 6V and still communicates — the 175 mV hysteresis ensures the bus state is latched cleanly even when the supply sags. Half-duplex operation is standard for LIN: the bus is a single-wire master-slave topology, and the transceiver's own driver disables during reception to avoid loopback.
ROHS3 compliant per the lifecycle record, which satisfies the material restriction requirements for EU and most global markets.
The tube packaging is typical for prototype and low-volume builds; for reel quantities the ordering code differs, so confirm the packaging preference at RFQ.